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The <effectiveTime> element encodes the period of administration of the medication,
it is always expressed as an interval of time.
It may be expressed using the <low> and <high> OR with the <width> element.
The first is used to indicate a specified interval (e.g. from march 15th, 2017); the
latter for indicating a 'floating' period (e.g. 2 weeks).
Elements to choose from:
- hl7:effectiveTime[hl7:low | hl7:high]
- hl7:effectiveTime[hl7:width]
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hl7:effectiveTime
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IVL_TS |
0 … 1 |
R |
Case 1: specified interval
The <low> and <high> values of the first <effectiveTime> element represent the start
and stop times for the medication. The <low> value represents the start time, and
the
<high> value represents the stop time. If either the <low> or the <high> value is
unknown, this shall be recorded by setting the nullFlavor attribute to UNK.
In case of unbounded period (continous terapy) the <high> element will be valued with
the nullFlavor attribute to NA.
The <high> value records the end of the medication regime according to the information
provided in the prescription or order. For example, if the prescription is for enough
medication to last 30 days, then the high value should contain a date that is 30 days
later then the <low> value. The rationale is that a provider, seeing an un-refilled
prescription would normally assume that the medication is no longer being taken, even
if the intent of the treatment plan is to continue the medication indefinitely.
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(Use…iod) |
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where [hl7:low or
hl7:high] |
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@nullFlavor
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cs |
0 … 1 |
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Example |
Known Interval <effectiveTime xsi:type="IVL_TS">
<low value="20130321"/> <high value="20140321"/></effectiveTime> |
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Example |
Information not available about the period <effectiveTime xsi:type="IVL_TS" nullFlavor="NI"/> |
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Example |
Unknown end date <effectiveTime xsi:type="IVL_TS">
<low value="20130321"/> <high nullFlavor="UNK"/></effectiveTime> |
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Example |
Continuous terapy <effectiveTime xsi:type="IVL_TS">
<low value="20130321"/> <high nullFlavor="NA"/></effectiveTime> |
hl7:low
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IVXB_TS |
1 … 1 |
R |
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(Use…iod) |
hl7:high
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IVXB_TS |
0 … 1 |
R |
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(Use…iod) |
hl7:effectiveTime
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IVL_TS |
0 … 1 |
R |
Case 2: 'floating' period:
The width element is used to specify a period of (actual or intended) administration
that is not anchored to any specific date (e.g. a two weeks therapy.....)
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(Use…iod) |
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where [hl7:width] |
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Example |
2 week period <effectiveTime xsi:type="IVL_TS">
<width value="2" unit="w"/></effectiveTime> |
hl7:width
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PQ |
1 … 1 |
R |
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(Use…iod) |
@unit
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cs |
1 … 1 |
R |
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CONF |
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Template UV Use Period
Draft